gledhill BM125 Installation And Servicing Instructions page 35

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Page 35
3.0 SERVICING
In addition to the main LED display the ACB has
four green LED'S which can be used to check
a supply is being provided when required to
the Boiler (LED 1), Boiler pump (LED 2) and
Heating pump (LED 3). LED 4 is not used on
this appliance.
The following procedure should be followed
to carry out these checks.
• Switch off mains
• Check and if necessary insert correct
jumpers 1, 3 & 4) to suit appliance type
• Insert jumper 5
• Switch on mains
• The PCB will carry out functional checks and
then stop
• Switch off mains
• Remove jumper 5
• Switch on mains to put into normal
operating mode
During the functional checks the green LED's
1-4 will be switched on and then off at 5
second intervals.
Note: If the A.C.B. board is replaced it will
re-initialize itself automatically.
The operation of the system controls/
operation can then be checked.
The same appliance control board is used
on a number of appliances and the jumpers
MUST be in the correct position for the
appliance to work satisfactorily.
See section 2.3 Commissioning for details.
If the problem cannot be resolved and the
appliance is fi tted with the switch emergency
electric backup this should be switched on and
operated in accordance with the instructions
on the label fi tted to the appliance until the
installer/manufacturer can attend.
W h e n r e q u e s t i n g a v i s i t f r o m t h e
manufacturer the installer must have the
completed 'Benchmark' commissioning/
service record sheet to hand to enable help
to be provided.